A relative asks what to give the new baby. Someone says a 529. You nod, look it up later, and hit a wall of rules.

That reaction is fair. A 529 is a simple idea buried under a lot of detail. The idea is this. Money grows without tax. It comes out without tax, if it goes to school.

The detail is where people get stuck. What counts as school. What happens if the child never goes. Whether your own state matters.

Here is how the account actually works.

The tax deal

You fund a 529 with money you have already paid federal tax on. There is no federal deduction. The IRS puts it plainly: contributions to one of these plans aren't deductible.

After that, the account grows untouched. No tax on dividends each year. No tax on gains when the plan shifts its holdings. And no tax at all when the money comes out, as long as it pays a qualified expense.

So the trade is simple. Nothing going in. Nothing coming out.

That middle part matters. In a regular taxable account, gains get taxed as they are realized. Inside a 529, they do not.

Every account has an owner and a beneficiary. Usually a parent owns it and a child is the beneficiary. They are not the same role. The difference matters later.

What counts as a qualified expense

The list is wider than most people expect. It also has hard edges.

For college and other eligible schools, it covers tuition and required fees. It covers books, supplies, and equipment the course requires. It covers a computer, related gear, software, and internet access, if the student uses them while enrolled.

Room and board counts, with two conditions. The student has to be enrolled at least half time. And the amount is capped at the school's own allowance for room and board in its published cost of attendance. A student renting an expensive flat off campus cannot pull the full rent out tax free. The school's figure is the ceiling.

Two other uses sit outside college. Up to $20,000 a year per beneficiary can go to tuition at an elementary or secondary school, whether public, private, or religious. That figure rose from $10,000 at the start of 2026. And up to $10,000 over a lifetime can repay qualified student loans for one person.

Registered apprenticeship costs also qualify. So do certain credential and certification programs.

What is missing is worth knowing too. Travel home at the holidays. Health insurance. Sports fees and club dues. This account does not reach those.

The state layer, which is not uniform

Federal treatment is the same everywhere. State treatment is not, and the spread is wide.

Some states let residents deduct contributions from state taxable income. Some give a credit instead. The size varies a lot. Some states offer the break only for money put into their own plan. A few allow it for any state's plan. Some states offer nothing at all. And states with no income tax have nothing to deduct against in the first place.

You are not locked into the plan your own state runs. Most plans accept residents of any state. The catch is that going elsewhere usually costs you the state break, where one exists. Some states also claw back deductions you already took if you later move the money out.

So the shape of the question depends on where you file. Two families can face the same federal rules and a very different state answer.

Gift tax and the five-year election

A contribution to a 529 is a gift to the beneficiary. That puts it under the gift tax rules.

The annual exclusion for 2026 is $19,000 per recipient. A gift at or under that amount needs no gift tax return. Two spouses can each give $19,000 to the same person, so $38,000 between them.

529s carry one extra option. A single large contribution can be treated as if it were spread over five years. The election lets one person put in up to five times the annual exclusion at once, then count a fifth of it against each of five years. At 2026 amounts, that is $95,000 from one person and $190,000 from a couple.

The trade-off is that those years are used up. Other gifts to that person during the five years may need reporting. Grandparents often use this to move a lump sum out of an estate.

When the money is not used for school

This is the question that stops people from opening one.

A withdrawal that is not for a qualified expense splits in two. The part that was your own contribution comes back with no tax. It was taxed already. Only the earnings portion is taxed, as ordinary income, to whoever receives it. On top of that, the earnings usually carry an extra 10% tax.

The 10% has exceptions. It does not apply if the beneficiary dies or becomes disabled. It does not apply if the beneficiary gets a tax-free scholarship, up to the amount of that scholarship. It does not apply if the beneficiary attends a US military academy, up to the cost of that education. And it does not apply to earnings pulled into income because the same expenses were used to claim an education tax credit.

Notice what the exceptions do and do not do. They waive the 10%. They do not make the earnings tax free. Income tax on the earnings still applies.

The scholarship exception is the one people miss. A child who wins a large scholarship does not leave the family stuck with a penalty.

Changing the beneficiary

The account is not welded to one child.

The owner can name a new beneficiary. There is no tax on the change if the new person is a member of the old beneficiary's family. That definition is broad. It reaches siblings, stepsiblings, parents, children, grandchildren, nieces, nephews, aunts, uncles, in-laws, first cousins, and the spouses of most of those.

In practice that means a younger sibling, a later grandchild, or the owner going back to study. It is also how leftover money in one child's account funds another child's.

Rolling leftovers into a Roth IRA

A 2022 law added a new exit. Since 2024, some leftover 529 money can move into a Roth IRA for the beneficiary. The conditions are tight, and they all apply at once.

• The 529 account has to have been open for 15 years.
• Anything paid in during the last five years, plus the earnings on it, cannot move.
• The transfer has to go straight from the plan to the Roth IRA.
• The Roth IRA has to belong to the 529 beneficiary.
• In any one year, the amount is capped at that year's IRA contribution limit, less any other IRA contributions the beneficiary made. For 2026 the IRA limit is $7,500.
• Because it counts as an IRA contribution, the beneficiary needs earned income for the year at least equal to the amount moved.
• Across a lifetime, the total that can move for one beneficiary is $35,000.

Read the yearly cap and the lifetime cap together. At $7,500 a year, reaching $35,000 takes about five years. And only in years the beneficiary earned enough. This is a slow drain, not a switch.

The 15-year clock has an open question attached. It is not settled whether changing the beneficiary restarts it. Treasury has not issued guidance on that point.

How financial aid sees it

Savings do affect federal aid. The size of the effect depends on whose asset the money is.

The FAFSA runs parent and student assets through different formulas. Parent assets get an allowance first, then a 12% conversion rate. The result then flows into a schedule that rises from 22% to 47%. The practical ceiling works out near 5.6 cents of aid eligibility per dollar held.

A dependent student's own assets get no allowance and a flat 20% rate.

That gap is why ownership matters. For a dependent student, a 529 held for that student is reported as a parent investment, not a student one. So it sits in the gentler formula.

There is a third case. If the student is the beneficiary of an account but not its owner, the value is not reported as a student asset at all. A grandparent-owned account is the usual example.

None of this makes a 529 invisible to aid. It does mean the account is read more like the parents' savings than the child's.

What the account is and is not

A 529 is a tax wrapper, not an investment. What sits inside it is picked separately, and that choice drives the returns.

Its strength is untaxed growth across a long stretch of years. That strength needs time to matter, which is why the account rewards being opened early.

Its weakness is that the money is pointed at one purpose. The exits are real: change the beneficiary, use the scholarship exception, move a slow trickle to a Roth. But each has conditions attached. And a plain non-qualified withdrawal costs income tax plus 10% on the earnings.

Those two facts sit next to each other, and neither cancels the other out. A family confident about future school costs is looking at a useful shelter. A family unsure the money will ever be needed for school is looking at a narrower tool with real exit costs.

The rules are identical in both cases. What differs is the fit.

References and sources

• Internal Revenue Service, Topic no. 313, Qualified tuition programs (QTPs). Source for contributions not being deductible, the $20,000 yearly K-12 tuition limit from 2026, the $10,000 lifetime student loan limit, and the $35,000 Roth rollover cap.
• Internal Revenue Service, Publication 970, Tax Benefits for Education. Source for the qualified expense list, the room and board cost-of-attendance cap, and the exceptions to the 10% additional tax.
• Internal Revenue Service, 529 Plans: Questions and answers. Source for tax-free qualified withdrawals and for beneficiary changes within the family.
• Internal Revenue Service, IRS releases tax inflation adjustments for tax year 2026. Source for the $19,000 annual gift tax exclusion.
• Office of the Law Revision Counsel, 26 U.S.C. § 529. Statutory text for the Roth IRA rollover conditions, including the 15-year period, the five-year look-back, the yearly cap, and the $35,000 lifetime limit.
• Internal Revenue Service, Publication 590-A, Contributions to Individual Retirement Arrangements. Source for the 2026 IRA contribution limit of $7,500.
• U.S. Department of Education, Federal Student Aid Handbook 2026-2027, Student Aid Index and Pell Grant Eligibility and Filling Out the FAFSA Form. Source for the 12% and 20% asset conversion rates, the 22% to 47% schedule, and how 529 accounts are reported by owner.

This article is educational. It does not represent financial, tax, legal, accounting or investment advice. Consult the appropriate qualified professional advisors before acting on its contents.